JP2003297588A - Light emitting element flashing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light emitting element flashing device having LED's wired by small number of wires as possible, capable of making respective LED's independently flash, exerting not any bad effect to the lighting operation of normal LED's even when a part of LED's becomes unlighted. <P>SOLUTION: A plurality of Zener diodes 28, serially connected to each other by connecting an anode terminal to an cathode terminal of adjacent Zener diode, are connected to a power source through a constant-current diode 22, and an LED 26 is connected to each Zener diode 28 in parallel through a flash control circuit 30 controlling the flash. Each one of Zener diode 28, flash control circuit 30, and LED 26 forms a set, and respective sets are mounted to lighting units 24a-24n, and it is made possible to wire at every unit. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a plurality of LEDs (Ligs).
The present invention relates to a light emitting element blinking device which is a circuit for blinking a light emitting element such as an ht emitting diode) and is applied to, for example, an illumination, a traffic sign, a construction sign and the like.

[0002]

2. Description of the Related Art FIG. 4 shows a circuit diagram of a conventional light emitting element blinking device, which will be described. The blinking device shown in FIG. 4 is
A plurality of LEDs 11a to 11n and these LEDs 11a
.About.11n, and a plurality of blinking control circuits 13a to 13n for controlling blinking of the LEDs 11a to 11n are connected in parallel to the power supply 15 in pairs.
In such a configuration, each blink control circuit 13a
Each of the LEDs 11a to 11n can be independently flashed by the number of 13 to 13n.

[0003]

However, in the conventional light emitting element blinking device, in order to make each of the LEDs 11a to 11n blink independently, each of the LEDs 11a to 11n.
It is necessary to connect 11n to the power supply 15 in parallel, which causes a problem that the number of wirings increases.

Further, as shown in FIG. 5, each LED 11
There is also a circuit configuration in which a to 11n are connected in series to the power supply 15 via the blinking control circuit 13, but in this case, all LEDs are connected.
11a to 11n can only blink simultaneously, and some L
If the ED is not lit for some reason, there is a problem that other normal LEDs will not be able to blink and so on.

The present invention has been made in view of the above points, and it is possible to wire a plurality of LEDs with the smallest possible number and to blink each LED independently, and also to turn off some LEDs. Even if it becomes other normal LED
It is an object of the present invention to provide a light emitting element blinking device that does not adversely affect the lighting operation of.

[0006]

In order to solve the above-mentioned problems, a light-emitting element blinking device of the present invention is a light-emitting element blinking device for blinking a plurality of light-emitting elements, which comprises connecting an anode terminal and a cathode terminal. A plurality of Zener diodes connected in series is connected to a power source, and each of the Zener diodes connected in series to the power source is connected in parallel with the light emitting element via a blinking control means for controlling blinking of the light emitting element. It is characterized by that.

Further, the Zener diode, the blinking control means, and the light emitting element are mounted in a unit as a set, and wiring is possible for each unit.

Further, a constant current circuit or a resistor for keeping the voltage of the zener diode constant is connected between the zener diode and the power source.

In the one unit, the blinking control means is connected to light emitting elements of respective colors of red, green and blue, and the blinking control means blinks or lights up by combining all or arbitrary colors of the light emitting elements of the respective colors. The feature is to let.

Further, a lamp socket for connecting a lamp is used instead of the light emitting element.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment) FIG. 1 is a circuit diagram showing a configuration of a light emitting element blinking device according to an embodiment of the present invention.

The light emitting element blinking device shown in FIG. 1 comprises a power source 20 and a plurality of lighting units 24a to 24n connected in series via a constant current diode 22. Each of the lighting units 24a to 24n includes an LED 26, a Zener diode 28, and a blinking control circuit 30 formed by an IC (integrated circuit), and the Zener diode 28 and a power supply terminal of the blinking control circuit 30 are connected in parallel. The LED 26 is connected to the cathode terminal of the Zener diode 28.
Of the LED 26 is connected to the control terminal of the blinking control circuit 30.

Further, each of the lighting units 24a to 24n.
Is connected in series to the power source 20 via the constant current diode 22 by connecting the anode terminal and the cathode terminal of each Zener diode 28,
A blinking control circuit 30 is connected in parallel to each of the Zener diodes 28 connected in series, and each blinking control circuit 3 is connected.
The LED 26 is connected to 0.

In actually manufacturing such a light emitting element blinking device, the LED 26 and the blinking control circuit 3 are used.
For 0, a commercially available LED with a built-in blinking IC that operates at a power supply voltage of 5 V was used. The current value of the constant current diode 22 is about 20% larger than the current when the LED is on. This is to make the generated voltage of the Zener diode 28 constant. This Zener diode 28 is
It is used to supply a constant power supply voltage to the blinking control circuit 30. Further, since one lighting unit 24a to 24n requires a power supply voltage of 5V, the total power supply voltage is obtained by the following equation.

Number of lighting units × 5 V + driving voltage of constant current diode (minimum driving voltage 3 V) In the light emitting element blinking device having such a structure, each lighting unit 24a ...
Since the blink control circuit 30 is mounted on 24n, each LED 26 blinks independently. In this blinking operation, when the LED 26 is turned on, most of the circuit current is L
It flows to ED26. When the LED 26 is turned off, a circuit current flows through the Zener diode 28. Therefore, the lighting units 24a to 24n perform independent lighting operations. If any LED 26 is not lit,
Since the power supply current is supplied to the other unit by the Zener diode 28 connected in series, the normal blinking operation continues in the other unit.

As described above, according to the light emitting element blinking device of the present embodiment, the plurality of Zener diodes 28 connected in series by connecting the anode terminal and the cathode terminal are connected to each other.
The zener diode 28 is connected to the power supply 20 via the constant current diode 22, and the LEDs 26 are connected in parallel to each of the zener diodes 28 via the flashing control circuit 30 for controlling flashing. In addition, the Zener diode 28, the blinking control circuit 3
Each of the 0 and the LED 26 is mounted as a set in one lighting unit 24a to 24n, and wiring is possible in units of the lighting units 24a to 24n.

That is, the plurality of lighting units 24a-24
Since n is connected in series to the power supply 20 via the constant current diode 22, it is possible to perform wiring with the minimum required number. Therefore, when this light emitting element blinking device is used as an electric decoration of the Christmas tree 40 as shown in FIG. 2, for example, the construction of the electric decoration becomes easy. In addition,
When the power source 20 is an outlet power source, a transformer may be built in.

Further, since the wiring can be made with the minimum required number, it can be manufactured at a low cost as compared with the conventional structure which requires a large number of wirings.

Also, a plurality of lighting units 24a to 24n are provided.
Since each has a blinking control circuit 30,
Each LED 26 can be blinked independently.

Further, since the LEDs 26 are connected in parallel to each of the plurality of Zener diodes 28 connected in series to the power source 20, even if one of the LEDs 26 does not light for some reason, the other normal LEDs 26 are turned on. Power can be supplied by the Zener diode 28, so that the normal lighting operation of the other LEDs 26 is not adversely affected (such as non-lighting).

Further, the Zener diode 28 and the power source 20
Since a constant current diode 22 for keeping the voltage of the Zener diode 28 constant is connected between and,
The generated voltage of the Zener diode 28 can be stabilized, and thereby the blinking control of the LED 26 can be stabilized.

As another embodiment, as shown in FIG. 3, each of the lighting units 24a to 24n (here, 2
4a is shown as a representative), and as the LED 26, blue,
Blue LED 26a, which is a light emitting element for each color of green and red, and green LE
The D26b and the red LED 26c may be used, and as the blinking control circuit 30, a microprocessor chip 30a capable of controlling blinking or lighting by combining all or arbitrary colors of the LEDs 26a to 26c of each color may be used.

In the case of this configuration, the LEDs 26a to 26c of the respective colors are controlled by the microprocessor chip 30a.
Since it is possible to light up in white by turning on all of them, in addition to this, it is possible to turn on in full color by lighting in combination with arbitrary colors.

In addition to the above, the LEDs 26 and the LEDs 26a of the respective colors
A lamp socket for connecting a lamp may be used instead of ~ 26c.

[0026]

As described above, according to the present invention,
A plurality of Zener diodes connected in series by connecting an anode terminal and a cathode terminal are connected to a power source, and each of the Zener diodes is connected in parallel with a light emitting element via a flashing control means for performing flashing control. Each of the diode, the blinking control means, and the light emitting element is mounted as a set in one unit, and wiring is possible in each unit. As a result, a plurality of light emitting elements can be wired with the smallest possible number and each light emitting element can be blinked independently, and even if some light emitting elements are not lit, other normal light emitting elements can be It is possible to prevent the lighting operation from being adversely affected.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of a light emitting element blinking device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration in which the light emitting element blinking device is applied as an electric decoration of a Christmas tree.

FIG. 3 is a circuit diagram showing a configuration of a light emitting element blinking device according to another embodiment.

FIG. 4 is a circuit diagram showing a configuration of a conventional light emitting element blinking device having a parallel connection configuration.

FIG. 5 is a circuit diagram showing a configuration of a conventional light emitting element blinking device having a serial connection configuration.

[Explanation of symbols]

13, 13a to 13n, 30 Flashing control circuit 11a to 11n, 26 LEDs 26a Blue LED 26b green LED 26c red LED 15,20 power supply 22 Constant current diode 24a to 24n lighting unit 28 Zener diode 30a microprocessor chip 40 Christmas Tree

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3K060 AA06 BA17 BC04 BD02 BD04                       EA01                 3K073 AA31 AA84 AA93 AB03 AB08                       CD03 CG16 CJ17 CK03 CL01                       CL05 CM09                 5F041 BB03 BB06 BB13 BB27 BB33                       FF12

Claims (5)

[Claims] 1. A light-emitting element blinking device for blinking a plurality of light-emitting elements, wherein a plurality of Zener diodes connected in series by connecting an anode terminal and a cathode terminal are connected to a power source and connected in series to this power source. A light emitting element blinking device, wherein each of the Zener diodes is connected in parallel with the light emitting element via a blinking control means for controlling blinking of the light emitting element. 2. The Zener diode, the blinking control means, and the light-emitting element are grouped as one set each.
The light-emitting element blinking device according to claim 1, wherein the light-emitting element blinking device is mounted on a unit, and wiring is possible for each unit. 3. The light emitting element blinking according to claim 1, wherein a constant current circuit or a resistor for keeping the voltage of the Zener diode constant is connected between the Zener diode and the power source. apparatus. 4. In the one unit, light-emitting elements of red, green and blue colors are connected to the blink control means, and the blink control means blinks or lights by combining all or arbitrary colors of the light-emitting elements of each color. The method according to claim 1, wherein
4. The light emitting element blinking device according to any one of 3 to 3. 5. A lamp socket for connecting a lamp is used in place of the light emitting element.
The light-emitting element blinking device according to any one of 1.